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Patented Aug. 17, 1920.

2 SHEETSSHEET E. E. PHINNEY.

H H w 23g 22 5w OVER aonmou CHECK FOR; CALCULATING MACHINE GEARS. APPLICATION FILED lULY 23 l l 1.349,.628.

E. E. PHINNEY.

OVER ROTATIDN CHECK FOR CALCULATING MACHINE GEARS.

APPLICATION FILED wur 23.1919.

Patented Aug. 17, 1920.

2 SHEETS-4"! 2.

l l ufl PHHHHHA. M M

Jn/fhfaf: d ufli: P/U'fin 6} w. am %1 fife/My) UNITED STATES PATENT OFFIQE.

E. PBINNEY, OF WESIIYOB-ANGE, NEW JERSEY, ASSIGNOR TO MONROE l CALCULATING MACHINE COMPANY, OF ORANGE, NEW JERSEY, A CORPORA- T1011 01? EW YORK OVER-ROTATION CHECK F08 CALCULATING-MACHINE GEARS.

Application filed July 23,

To all whom it may don/cam:

Be it knownthat I, Enoan E. Pmmmr a citizen of the United States, resident oi West Orange, in the county of Essex and State ofNew'Jersey, have made a certain new and useful Invention in Over-Rotation hacks for Calculating-Machine Gears; and

declare the following to she a full, clear, dndexact description of the same, suchas will enable others skilled in the art to which it appertains to make and use the. invention, reference being had to the accompanydrawings, and to letters or figures of fierence inarked thereon, which form a part of this specification.

F igure 1: is' a plan view of the invention as applied.

* .Flg. 2 is a vertical section of the invention as. applied on the line 2-2, Fig. 1.

F 1g. 3 is a detail sectional view on the line Fig. 4 is a detail perspective view of one of the supporting fingers.

The invention has relation to calculating machines, and particularly to the provision of an improved over-rotation check whereby the operating wheels, which must rotate rapidl ,and freely, are held from going ahead y momentum.

The invention consists in the novel construction and combinations of parts, as hereinafter set forth.

In the accompanying drawings illustrating the invention, as applied to a machine of the type of that shown in the atent to Baldwin, of December 8, 1914, issue 13,841,

the numeral 5 designates the selecting wheels or differential actuating wheels; 13 the dial or number whec'ls having attached gears 13',

and 12 the gears intermediate of said num-.

ber wheels and selecting wheels.

The invention is designed as an improvement of the device of the patent of the same applicant, dated December $2, 1916, No. 1,208,366, wherein a rod located internally. of a coiled spring is employed, said-rod having cigcumferential enlargements located at intervals and afl'ording a bearing to enable certain .of the spring coils to be temporarily displaced or distorted edge'wise, for the purpose stateda 4 designates the coiled spring of the present invention, located transversely of the Specification of Letters Patent.

coi having perforations or circular openingsdl Patented Aug. 17, 1920. 1919. Serial 1%.- 812,788.

machine and closely wound, having aneye or loop 6 atceach end thereof and engaged by angularly bent extensions 7 of en porting brackets or clips 8, the latter carried by a transverse bar 9. This transverse bar is stationary, bein suitably supported from the framing of the machine.

At each end and intermediately of its length bet-ween each pair of wheels 13, the ed spring is supported by fingers 10,

of about the same diameter as the external diameter of and engaged by said spring. These fingers have stems resting upon the bar 9 and clamped thereto by screws 14 and clamp bar 15.

Mounted upon the coiled spring are rollers 16, loosely engaging the spring and freely rotatable thereon, each roller having engagement with the teeth of one of the in termediate gears 12, lateral flanges 17 of the rollers preventin escape thereof from enga ement with t e gears the diameter of eac roller being such as to fit in between two adjacent teeth of the respective gear so as to hold the latter normally against rotation, so that when the intermediate gears are rotated bv the selecting wheels they will be each yieldingly checked tooth by tooth, without any slackening of the spring pressure or check against rotation of the adjacent gegr or gears.

n operation, the coils of the particular portion 5f the sprin r affected will yield and be displaced edgewiie, the displacement being greatest immediately opposite the gear 12 under rotation and ecreasing toward each supporting finger 10, the fingers or sup- Eorts being located at the half-way point etween the gears 12,- and serving to localize the spring action to the particular portion of the sprin allotted to each gear, it designed t at the spring check upon the adjacent gear or gears shall not be disturbed as stated.

.The elastic reaction of all of the distorted coils will cause the center coil or coilsim-KLQO mediatcly opposite the gear to react and engage the roller 16 withthe next or succeeding teeth. The displacement of the spring .coils is substantially in the planes of the;

' culating machines.

' sp rin; extruding parallel-to the or circumferentially braced by the finger supports points between the-gears 12.

t is found in practice that the spring works much better or easier and with less noise and friction if stretched by the aforesaid clips 8, with its coils out of contact with each other, and the sprinfg so stretched and held in tension s also ound tendencyv to with a much the internal rod of the said patent;

Thefing'ers 10 may lie-adjusted toward and away from the intermediate gears, to var the pressure of the spring rollers upon sai gears by loosening t e screws 14, and tighten' themragain after the desired ad-' justment is'efi'ect'ed; 1

Preferably the transyerse'bar 9 is held to theframing by end screws 18, one of which engages an angular end bracket l9,"of said bar, and the shaft. 12--of the intermediate ears is held to the fr ining by end screws stems 22, secured ,to said" bar by the aforesaid clamp bar andscrews 14, said plates ing riveted to sleeves 23, locatedfnpon the shaft,12 of the intermedia ,eearslbetween said gears, whereby npo removal of gears, and the check 1. A yieldallle check device adapted to prevent oror rotation of gear wheels of calconsisting of a coiled spring extending parallel to the shaft of said gear wheels, and at'intcrvals hearing against the teeth of said whccls. located midway between said wheels and externally of said spring tohold certain of the coils of the spring against displacement and to localize tho spring action of certain othcr coils of'the gear w'hcejs. ,1 c

2, yicldalrh) check dcricc adapted to prevent m cr-rotationof gear who -ls of cal cnlating'piachincs, consisting ol' a coiled shafl ofi s and carrving anti-friction at intervals and" of said whccls.

and stiffened, '10 at the midway.

't is stretched and heldv to be more eificient,'lessening the, h

. j t e prevent ovebrotation of g culating machines, v I spring extending parallel to thefshaft of said gear wheels and at intervalsthrough.

I againstjthe teeth of said wheels,

' ,vent over-rotation of or plates 21, have extending parallel to the shaft of said gear a ainst the saidwheelesa id spring liaving it's e screws 18 and 20 tie transverse bar'9,

the shaft--l2 and its spinp 4 may be removed asa whole or unit.

and means spring with rcspect to said Y hon of certain la-aring and moans lating machines, i consisti of a coiled spring extending parallel to the shaft of said gear wheels and carrying anti-friction rollers located at intervals and. bearing against the teeth of said wheels, and stifi'ening and bracing members located e spring to hold certain of the coils of the spring against displacement and to localize t e spring action of certain other ooilsof spring with midway, els and externally of said respect to said geanwheels."

4. y eldablevcheck .d evice adaptedgto' 2 the medium of anti-friction rollers bearing i having its coils out of contact I other, means for holding the spring with its C0llS so outofcontact, and means located U v tohold midway between said gearwheels certain of the coils of the spring againstf isplacement and to localize the spring action of certain other coils of the springwitli respect to said gear wheels.

a. A yieldahlecheck device adapted prolating machines, consisting of a coiled s wheels and at intervals bearing teeth of coils out of contact with each other,means gear wheels of ealcu; P

and externally of said spring to hold certam of the coils of the spring against dis-, placement and to localize the spring action of certain other coils of the spring with re spect to said gear wheels.

6. A yieldahle check device adapted :to i prevent over-rotation of gear wheels of cal consisting of a coiled 'cnlating machines, spring extending parallel to the shaft (if said gear wheels and against the teeth of said wheels. said sp ril'ig heing stretched and having its coils ont'of contact with each other, means for holding hold cortainof displacement and to localize the other coils'of the rcspcct to so id gear wheels.

7. yiel'dahle spring at intervals bearing the coils of the spring against 8.0- i

iii

cnlating machines. consisting'ofa coiled spring extending parallel to the shaft of said gcar wheels and at intervals bearing against the tecth of said wheels. said spring being strctrhed and haring its coils out of contact with each other. means for holding the spring so stretched and under tension 1.3a.

with its coils out of contact, and stiffening and bracing members located midway between said wheels and externally of said spring to hold certain of the coils of the 5 ring against displacement and to localize tie spring action of certain other coils of the spring with respect to said gear wheels.

\Vitnessesz.

W. I. Bnuzvmo,

L. DAGGART. 

